172812 has 12 divisors (see below), whose sum is σ = 403256. Its totient is φ = 57600.

The previous prime is 172807. The next prime is 172829. The reversal of 172812 is 218271.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7189 + ... + 7212.

2¹⁷²⁸¹² is an apocalyptic number.

172812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

172812 is an abundant number, since it is smaller than the sum of its proper divisors (230444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172812 is a wasteful number, since it uses less digits than its factorization.

172812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14408 (or 14406 counting only the distinct ones).

The product of its digits is 224, while the sum is 21.

The square root of 172812 is about 415.7066273227. The cubic root of 172812 is about 55.7003553037.

It can be divided in two parts, 1728 and 12, that multiplied together give a 4-th power (20736 = 12⁴).

The spelling of 172812 in words is "one hundred seventy-two thousand, eight hundred twelve".